Synthesis and crystal structures of mono-helical complexes of zinc(II) and europium(III) with 1,2-bis{[3-(2-pyridyl)pyrazol-1-yl]ethoxy}ethane

Michael H.W. Lam, Derek Y.K. Lee, Sammi S.M. Chiu, K. W. Man, Wing Tak Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)


A new multidentate ligand L, 1,2-bis{[3-(2-pyridyl)pyrazol-1- yl]ethoxy}ethane, has been synthesized by linking two 3-(pyridin-2- yl)pyrazoles with a 1,2-bis(ethoxy)ethyl spacer. Coordination of L with zinc(II) and europium(III) centres has led to mononuclear complexes of [Zn(L)](ClO4)2(1) and [Eu(L)Cl2](ClO4) (2). X-ray crystal structures of both complexes have shown that L adopted a helical coordination geometry around both metal centres. The spectroscopic properties of both complexes have also been determined. In 1, photoluminescence was dominated by ligand centred1(π-π*) fluorescence. In 2, ligand-to-metal energy transfer leading to5D0→7Fn luminescence at the europium(III) centre was observed.
Original languageEnglish
Pages (from-to)1483-1488
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number7
Publication statusPublished - 1 Jan 2000
Externally publishedYes


  • Europium
  • Helical structures
  • Ligand design
  • N ligands
  • Zinc

ASJC Scopus subject areas

  • Inorganic Chemistry

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